TROUBLESHOOTING
Restricted Flow of Hot Water
Possible Reason
Solution
Partially closed water supply
valve to the unit.
Open water supply valve.
Hot Tank outlet hole is scaled
over.
Remove outlet tube from hot tank to faucet. Add descaler to
hot tank.
Tubing is creased or has a
“kink” in it.
Inspect and replace tubing as necessary.
Faucet nipple screen mesh has
obstruction(s)
Unscrew faucet nipple from faucet and remove any
obstruction(s) from screen mesh.
Exhausted Filter
Replace the Filter
Solenoid connection to the
Display PCB
Turn power off; unplug the unit and visually inspect solenoid
connections into the Display PCB. Verify the soldering points
on connections are secure into the board.
Remove the PCB to inspect the front of the board.
Solenoid Valve is
Malfunctioning
Inspect valve components for proper function. Replace as
necessary.
WL400
Operating, Installation, and Service Manual Page 60 - Revision: 5-29-2015